<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    iframe {
      width: 800px;
      height: 600px;
    }
  </style>
</head>

<body>
  <a href="http://www.jd.com" target="abd">京东</a>
  <a href="http://www.taobao.com" target="abd">淘宝</a>
  <a href="http://www.baidu.com" target="abd">百度</a>

  <iframe name="abd" src="www.baidu.com" frameborder="0"></iframe>
</body>

</html>